
2 is popular for people whom like to keep a separate system partition and a separate data partition.

All of these things are a little more complicated and NOT for the feint of heart. 1) It is a 2nd hard drive or 2) Original HD was split in two parts (partitions), C: & D. There are also some programs that will move an installed program to another drive letter and then move the registry settings that reference it to a new drive letter. You can extend the partition through a directory. There are several advanced ways to extend you C drive onto other partitions. : The most Authoritative Technology Blog. You can find the directions here: Jason S: How to easily merge two partitions (C and D drive) in Windows Vista. If the C and D drives are on the same disk, there is a pretty easy way to get rid of the D drive and then extend the C drive you use all the space. Moving the "My Documents" folder is a great idea assuming that TreeSize tells you that it's taking up a bunch of space. Trying to move an installed program would be foolish. The key to moving things successfully is to find things that are using gobs of space but aren't truly tied to a location.

You can browse through the tree it creates and see where all your space has gone.

With it, you can right click your C drive and choose "TreeSize" and it will begin parsing all files, folders, and sizes. My suggestion is to install this utility.
